#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int x, y;
	scanf("%d%d", &x, &y);
	int s = 100 * 100/2 - x * y / 2 - (y + 100) * (100 - x) / 2;
	printf("%d", s);
	return 0;
}